Window sash lock



April 5, 1932- a J. NIE'JADLIK 1,852,213

WINDOW SASH LOCK Original Filed Feb. 10, 1930 2 Sheets-Sheet l In venior I L/OH/V 1145/7404 m1 A itorney April 5, J NlEJADLlK WINDOW SASH Lock original Filed Feb. 10, 1930 2 Sheets-Sheet 2 I A Illi 74 A itorney Patented Apr. 5, 1932 JOHN NIEJADLIK, OF GLENDALE, NEW YORK WINDOW SASH' LOCK Application filed. February 10, 1920, Serial No. 427,271. Renewed February 2, 1932.

This invention relates to window sash locks and has for one of its important objects to provide, in a manner as hereinafter set forth, a device of this character embodying a construction and arrangement of parts whereby both the upper and lower sashes of a window may be expeditiously secured simultaneously in any adjusted position.

Another important object of the invention is to provide a window sash lock including means for rigidly locking the upper and lower sashes together and further having means for looking or securing said lower sash to the window frame in which the same is slidably mounted.

Other objects of the invention are to provide a window sash lock of the character set forth which will be simple in construction, strong, durable, efiicient in its use and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein Figure 1 is a perspective view showing a window sash lock constructed in accordance with this invention mounted on a window and in operative position.

Figure 2 is a view in front elevation of the invention.

Figure 3 is a top plan view partly broken away in horizontal section of the device.

Figure 4 is a rear end elevation thereof.

Referring to the drawings in detail, the reference character 1 designates the frame of the window in which the lower and upper sashes 2 and 3, respectively, are slidably mounted. The upper sash 3 is disposed between the parting strip 4 and the outer guide strip 5 and the lower sash 2 is mounted between the parting strip 4 and the inner guide strip 6. As usual, the sashes 2 and 3 are provided withthe meeting rails 7 and 8 respectively at their adjacent ends.

Mounted on one end portion of the upper side of the meeting rail 7 of the sash 2 is a horizontally disposed metallic bar 9 having a foot or base portion 10 disposed on the top of said meeting rail and provided with a transverse slot or recess 11 in its free edge'for the reception of a securing screw 12 which is anchored in the meeting rail 7. The bar 9 is .1

vertically disposed and is substantially flush with the'inner-vertical face of the meeting rail 7, as, illustrated to advantage in Figures 1 and 3 of the drawings.

At its outer end, the bar 9 provid'edwith an upstanding enlargement 13 formed integrally thereon and 'havinglaterally projecting teeth 14 on its free marginal portion adapted to bite into the inner side of the guide strip 6, said enlargement 13 constitut? ing one of a pair of jaws. The j aw13 is provided, on the end thereof remote from the bar 9, with an integral right angularly disposed extension 15 which extends in opposed relation to the adjacent space ofthe frame 1.

1 'A jaw 16 is shiftably mounted'on thexp tension 15 of the jaws 13 through-the m d of a right angularlydisposed extension 17: which, as illustrated to advantage in Figure 4 of the drawings is provided withelongated slots 18 for the reception of the head-ed' pins" I 19 which are mounted in said extension :15. The jaw 16 is provided with projecting teeth orlugs '20'adapted to bite into the adjacent side of the parting strip 4. The jaw 16 is 22 isv adapted to bite into the adjacent face of 1 the upper sash 3 when the jaw 16 is engaged with the parting strip 4 in a manner to se curely lock the upper sash to the lower sash and at the same time lock said lower sash between the guide strip 6. l

parting strip 4 and the inner An integral casing 24 extends. inwardly from the extension 15 and encloses a pair of wedge blocks or cams and 26 whichare mounted on the jaws 13..and 16, respectively. A screw 27 is mounted for rotation through the forward wall of the casing 24 and is provided with a threaded shank 28 upon which is mounted a wedge member 29 adapted for engagement with the cams 35 and 26 in a manner to cause the spreading of the jaws to locking position. On its outer end the screw 27 is provided with a winged head 30 to facilitate the operation of said screw.

When the screw is actuated in a manner toengage the Wedge 29 with the cams 35 and 26, the teeth let and 20 on the jaws 13 and 16,

respectively, are caused to bite into the inner side strip 6 and the parting ,strip l andthe lower sash 2 may thus be secured in any desired position in the window frame. As the inner jaw 16 moves into engagement with the j V 5 parting strip '4 the spur wheel 22 is engaged withthe upper sash 3 and in this manner the upper sash is rigidly secured to the lower I sash inan'y desired position relative thereto.

It'is believed that the many advantages of window sash lock constructed in accordance with fthi's invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to beunderstood that changes 25- in the details of construction 'may be had I which will fallwithin the scope of the invention as claimed,

What is claimed is 2 1. .A window sashlock of the character defim scribfedr comprising a pair of complemental aws slidably connected together and adapted for disposition between the parting strip and a guide strip of a window frame, a casing 7 formed on one of said jaws, cams formed on ,said jawsand disposed within thecasing in spaced opposed relation to each other, a screw rotatably mounted in the casing and extend ing between the cams and a wedge threadedly mounted onthe'screw for actuation thereby,

4o' sai'd wedge engageable with the cams in a manner .to shift the jaws to'locking and une locking positions.

2 'A windo w sash lock of the character described comprising a pair of complemental 46- aws slid'ably connected together and adapted v foridispositionbetween the parting strip and j a guide strip of a window frame, a casing formedononeof said jaws, cams formed on said jawsand disposed within the casing in v I 50 spaced opposed relation to each other, a screw rotatably mounted the casing and extending between the cams and a wedge threadedly mounted on the screw for actuation thereby, said'we'dge engageable with the cams in a I manner to shift the jaws to locking and unlocking positions, an integral extension on one of the jaws, and a spur wheel eccentrically'mounted on the extension and engageable iwithanother sash of the window for flo loclfiing said other sash to the first named sas Intestimony whereof I aflix my signature.

' JOHN NIEJADLIK 

